Is It the Preservative—or the Cocktail?

If you’ve ever looked at the ingredient list on a packaged food and thought, What are all those things? you’re not alone.

Food preservatives and other additives are used for many reasons: to prevent spoilage, maintain texture, preserve color, improve taste, or help a product remain stable on the shelf.

Most are considered safe at the levels permitted in food. But scientists are increasingly asking a different question:

What happens when we’re exposed to many different additives, repeatedly, over many years?

That question is harder to answer—and some new research is beginning to explore it.

A large study found an association with cardiovascular disease

A 2026 study published in the European Heart Journal followed 112,395 adults in France for a median of about 7.9 years.

Participants repeatedly recorded what they ate, including brand names and industrial products, allowing researchers to estimate exposure to individual food additives and groups of preservatives.

Exposure was extremely common: 99.5% of participants consumed at least one preservative during the first two years of the study.

Compared with people consuming the lowest amounts, those with the highest exposure to non-antioxidant preservatives had a:

• 29% higher incidence of hypertension
• 16% higher incidence of cardiovascular disease

Higher consumption of antioxidant preservatives was also associated with a 22% higher incidence of hypertension.

Researchers also identified eight individual preservatives that were associated with higher hypertension risk after statistical adjustment:

• Potassium sorbate (E202)
• Potassium metabisulphite (E224)
• Sodium nitrite (E250)
• Ascorbic acid (E300)
• Sodium ascorbate (E301)
• Sodium erythorbate (E316)
• Citric acid (E330)
• Rosemary extracts (E392)

That list needs an important qualification.

Some substances on it may sound alarming but are also familiar compounds with other roles. Ascorbic acid is vitamin C, for example, and citric acid occurs naturally in many fruits. The study was examining their use as food additives—not declaring these substances inherently dangerous.

And this was an observational study.

That means the researchers found an association, not proof that the preservatives caused hypertension or cardiovascular disease. Even after adjusting for many potential confounding factors, other differences between people with higher and lower additive exposure could contribute to the results.

So this isn’t a reason to look at an ingredient label and panic.

But then another study raised an even more interesting question.

What if it’s the combination?

A September 2026 study in BMC Medicine looked specifically at mixtures of food additives.

Researchers followed 112,050 adults in the NutriNet-Santé cohort for about 7.9 years and examined five patterns of additives that people commonly consumed together.

Four of the five mixtures were associated with at least one cardiovascular outcome.

For example, one mixture containing modified starches, pectin, guar gum and carrageenan was associated with higher incidence of:

• hypertension
• cardiovascular disease
• coronary heart disease

Another mixture containing citric acid, sodium citrate, phosphoric acid and the sweetener acesulfame-K was associated with higher hypertension incidence.

But one of the five mixtures showed no significant association with the cardiovascular outcomes studied.

The researchers also explored whether some additives might interact with one another in ways that could strengthen or weaken their individual effects.

This is important because most people don’t consume additives one at a time.

We consume foods.

And a single packaged food can contain several additives.

The idea isn’t limited to heart disease

Earlier research from the same NutriNet-Santé cohort has also examined additive mixtures and other health outcomes.

A 2025 PLOS Medicine study involving 108,643 adults found that two of five commonly consumed additive mixtures were associated with higher incidence of type 2 diabetes.

One of those mixtures included modified starches, pectin, guar gum, carrageenan, polyphosphates, potassium sorbate, curcumin and xanthan gum.

Another included several substances including citric acid, sodium citrate, phosphoric acid, acesulfame-K, aspartame and sucralose.

Again, these findings were observational. They don’t establish that the mixtures caused diabetes.

A 2026 BMJ study involving 105,260 adults looked at food preservatives and cancer.

Several individual preservatives were associated with certain cancer outcomes, but 11 of the 17 preservatives studied individually were not associated with cancer, and total preservative intake was not associated with overall cancer incidence.

That is a useful reminder that the research isn’t producing a simple story of “preservatives are bad.”

So what should you actually do?

At this point, there isn’t enough evidence to tell people that a particular preservative—or a particular combination of additives—causes heart disease, hypertension, diabetes or cancer.

The studies are interesting because they’re asking a better question.

Instead of examining one chemical in isolation, researchers are beginning to investigate the mixtures of additives people actually encounter in everyday diets.

That’s a much more complicated scientific problem.

It also means we should be careful about turning an interesting research finding into a new dietary rule.

One reasonable takeaway doesn’t require memorizing E-numbers or eliminating every unfamiliar ingredient.

Eating more fresh and minimally processed foods naturally reduces exposure to large numbers of additives and additive combinations. It also tends to make it easier to build a diet around foods with useful nutrients rather than around highly processed products.

That’s a general healthy-eating pattern—not a prescription to fear a particular ingredient.

The bigger question

The most interesting finding may not be that one particular additive is dangerous.

It may be that scientists are finally beginning to study something closer to the way we actually eat:

not one additive at a time, but combinations of many additives consumed repeatedly over years.

We don’t know yet whether those combinations actually cause disease.

But it’s a question worth watching.